Rulon had 1 fight in MMA and dominated a good fighter in Yoshida. What if he decided to continue to fight to save his friends and family's farms?
I don't think he would beat Fedor or Mino but he could probably beat a lot of good fighters. I think he'd struggle against leg kickers but he might embarrass a lot of wrestling based fighters. Mark Coleman, Fujita, and maybe Mark Kerr come to mind.